Quote Originally Posted by ej
2) The scale worst-case anthropogenic climate change scenario is minor in comparison to the scale of naturally occurring climate changes that may occur at any time independent of human activity ...
i think that this is true, but misleading. to exaggerate, it is comparable to saying that because there are tidal waves, there's no point in having lifeguards. the scale of naturally occurring climate changes to which you refer, such as a mini-ice age with onset over only 100 years, would be devastating, global catastrophes, likely involving the deaths of billions of people. we could never compensate adequately for such an occurrence. but i don't think that relieves us of responsibility to address as best we can smaller catastrophes - of whatever cause - that we have the capacity to ameliorate.